Means for protecting driving-pulleys.



No. 851,0 04. PATBNTED APR. 23; 1907.

. B. M. W. HANSON.

MEANS FOR PROTECTING DRIVING PULLBY'S. APPLICATION IILEDSEPT. 8 1.906.

UNITED STATES PATENT OFFICE.

BENGT M. W. HANSON, OF HARTFORD, CONNECTICUT, ASSIGN OR TO PRATT &WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A'CORPORATION OF NEW JERSEY.

MEANS FOR PROTECTING DRlVlNG-PULLEYS.

Patented April 23, 1907.

To all whom, it may concern;

Be it known that I, BENGT M. W. HAN- SON, a citizen of Sweden, havingdeclared my intention of becoming a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements in Meansfor Protecting Driving-Pulleys, &c., of which the following is aspecification.

This invention relates to the head-stocks of grinding and analogousmachines in which the pulley or other driven element is liable toreceive detritus from the grinding-wheel, milling-tool, or otherimplement employed for reducing purposes and in which the workdrivingelement is supported for rotation on a fixed sleeve or bushing insertedin the headstock and carries a device for engaging a dog secured to thework.

My invention has for its main object the provision of improved means forprotecting the driven element in such a way that it will be impossiblefor foreign matter, such as refuse from the reducing-tool and the work,to enter the bearing and other parts.

A further object of the invention is the provision of constructionaldetails, which will be hereinafter described.

Other objects of the invention will be hereinafter set forth.

In the accompanying drawings, Figure 1 is a side elevation of theheadstock of a metalreducing machine to which my invention may beapplied. Fig. 2 is a longitudinal vertical section showing a singlebelt-pulley in lieu of the multiple belt-pulley.

Like numerals designate similar parts throughout the several views.

Referring to the drawings, the numeral 5 designates part of thereciprocatory carriage of a machine, and 6 a head-stock adjustablysecured to a table '7 thereof in any desired way. This head-stock isbored longitudinally to receive a sleeve or tubular spindle 12, having acircular flange 12, which enters a rabbet 13 in the tubular bearings 14.At its inner end 12 the sleeve 12 is externally threaded at 15, for apurpose hereinafter described.

Designated by 16 is a perforated disk or washer, having aninwardly-projecting flange 16, said disk being slipped upon the part 12of sleeve 12 and bearing atits back against the flange 12, as shown inFig. 2.

A bushing 17, flanged at 17 where it is provided with spanner-holes 18,is internally threaded at 17 2 to engage the thread of the sleeve 12,and this bushing is formed with a smooth periphery 17 which serves as abearing-surface for a pulley or other driven element 19 now to bedescribed. This driven element is formed with circular grooves 20 20 ineach of its ends, and in the chambers formed by these grooves are placedwashers or rings 21 21, of felt or other suitable material, the groove20 receiving the flange 16 of disk 16 and the groove 20 the flange 17 ofbushing 17, said flanges bearing against the outer washers, and in thisway keeping the joints tight, as will be readily understood.

Designated by 22 is a disk, which is secured to the pulley 19 by screw23 and the dog-engaging pin 24, and said disk serves to cover andprotect all the joints of the front of the pulley and also to serve asone of the pulley-flanges. To avoid unnecessary bearingsurface, theinner side of the disk is grooved at 25 opposite the flange 17, and itis provided with a flared opening 26, where it surrounds the fixedcenter, the latter being designated by 27.

In Fig. 1 a grooved pulley is shown; but with this exception the partsare the same as in Fig. 2.

From what has been stated it will be seen that the parts are fullyprotected against the entrance of water, detritus, or foreign matter ofany kind and that the pulley will run true and evenly, thus imparting acorresponding movement to the article it drives. Furthermore, theinvention is not limited to any particular use, for it may be employedto protect either rotary driving or driven elements in various arts.

Having thus described my invention, what I claim is v 1. Thecombination, with a flanged sta tionary support, of a flanged bushing inremovable connection with said support; a member rotatable on saidbushing; a disk located between the end of the bushing and the flange ofthe support, said disk protecting one side of the rotatable member; anda disk secured to the other side of said rotatable member, and servingto protect the support and bushing.

2. The combination, with a flanged stationary support, of aninwardly-flanged disk loosely mounted on said support; a rotatablemember having circular grooves in its sides; packing in said grooves; aflanged bushing secured to the support, and upon which the rotatablemember is mounted; and a disk secured to said rotatable member andprotecting the joint between the bushing and the support. 7

3. The combination, with a support having a circumferential flange, of aflanged disk mounted on said support and the back of which bears againstsaid flange; a rotatable member having circumferential grooves in itssides; packing in each of said grooves; a bushing threaded upon thesupport, and having an inward flange at its outer end; a disk having aportion protecting the joint between the bushing and support; and meansfor securing said disk to the rotatable member.

4. The combination, with a support having a circumferential flange, ofan inwardlyflanged disk sleeved upon said support; a bushing threadedupon the support, and bearing against the disk, said. bushing beingflanged at its outer ends; a rotatable member sleeved upon the bush ngbetween the flange thereof and the disk, and having grooves or chambersin its sides; packingwashers in said grooves or chambers; and meanssecured to said rotatable member, and serving to protect the jointsbetween the bushing and the rotatable member and between the bushing andthe support.

5. The combination, with a tubular support having a circumferentialflange, of a flanged disk sleeved upon said support, and bearing againstsaid circumferential flange; a bushing in threaded engagement with thesupport; a pulley mounted. on said bushing and having chambers in itssides; packingwashers in said chambers and in engagement with theflanges of the disk; a disk secured to the pulley, and constituting oneflange thereof, said disk serving to close the joints between thebushing and said pulley.

6. The combination, with a stock having a bearing, of a flanged sleevemounted in said bearing; a flanged disk carried by the sleeve; arotatable member having a chamber in its side for the reception of theflange of the disk; a bushing rigid with the sleeve, and upon which therotatable member is mounted; and means for protecting the side of therotatable member and bushing at the side opposite that where the flangeddisk is located.

7. The combination, with a stock having an overhang provided with abearing rabbeted at its forward end, of a tubular sleeve provided with aflange which is inserted in the rabbet of the bearing; a flanged diskmounted on the sleeve, and bearing against the flange thereof; a bushingsecured to the sleeve, and the end of which is in contact with saiddisk, said bushing having a flange at its opposite extremity; arotatable member sleeved upon the bushing, and having chambers in itsside for the reception of flanges of the disk and bushing;packingwashers located in said chambers; and a disksecured to the frontof the rotatable member, and serving to protect the joints between saidmember and the flange-bushing, and between the flange-bushing and thesleeve.

In testimony whereof I afliX my signature in presence of two witnesses.

BENGT M. WV. HANSON.

WVitnesses:

LAURA A. KROHER, CHAS. MUNGER.

